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LEAD PRESENTATION

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    LEAD PRESENTATION LEAD PRESENTATION Presentation Transcript

    • LEAD Max Wortman Period 5
    • LEAD – 6P14 Electrons: 82 Neutrons: 125 Protons: 82 Atomic Mass: 207.2 Melting point: 327.6º C
    • Basic Information
      • Lead is a basic group element with symbol “Pb” and atomic number 82.
        • Derives from Latin word plumbum
      • Lead is a soft, malleable poor metal.
      • It is also counted as a heavy metal.
      • A soft blue-grey metal
      • Lead, when exposed to air, turns to a dull, gray color.
      • Found in a natural environment.
      • Labeled as a “post-transition metal”
      • Still used in consumer products.
        • Such as paint and gasoline
    • History
      • Lead has been commonly used for thousands of years because it is widespread, easy to extract and easy to work with.
      • The Romans had the largest lead mining economy in history.
      • Lead’s symbol “Pb” is an abbreviation of its Latin name “plumbum” for soft metals.
      • Unfortunately, no one knows who discovered lead.
      • There is evidence that the first discovery of lead was 9,000 years ago.
    • How does lead get into the environment?
      • Deterioration of lead-based paint
      • Leaded gasoline
      • Lead mines or smelters 
    • How are people exposed to lead?
      • Dust, paint, and/or soil
      • Contaminated food, water, or alcohol
      • Some imported home remedies and cosmetics
    • Lead in home environments:
      • Pre-1978 homes with deteriorated leaded paint
      • Children at greatest risk
      • Most exposure through leaded dust in home
      bare soil porch windows doors walls tracked in Lead in dust
    • How are people exposed to lead in work environments?
      • Swallowing lead dust
      • Breathing contaminated air
      • Lead contacting skin
      • Workers can expose their families if they bring lead home on their clothes or skin
    • What jobs involve lead?
      • Lead smelting or mining
      • Construction/ remodeling
      • Automobile repair
      • Plumbing
      • Police officers/military
      • Many others
    • Lead in drinking water
      • Lead can enter water by leaching from
        • Lead-containing pipes
        • Brass faucets
        • Solder
      • Boiling does not get rid of lead
      • Running cold water before use may reduce exposure
    • Lead in commercial products
      • Lead is still used in products such as:
        • Bridge paint
        • Computers
        • Solder
        • Ceramic glazes
        • Jewelry
        • Automotive batteries
      • Imported or older pre-regulation products
    • Lead in food products
      • Food or beverages may be contaminated through
        • Production
        • Packaging
        • Storage
    • Effects of lead
      • No known threshold for effects of lead
      • Affects all organ systems
      • Developmental neurologic effects
      • Affects fetal viability, and fetal and early childhood development
      • Maternal lead may affect child’s neurologic development
    • FIN
    • FIN Max Wortman Period 5